Looking for a “powerhouse” vegetable? Go for watercress. This cruciferous vegetable scored a perfect 100 in a CDC study that ranked 47 fruits and vegetables for their nutrient density, based on 16 key nutrients and fiber.
With its small, crisp, dark green leaves and pungent, slightly bitter, peppery flavor, watercress is a highly underrated vegetable that can add zest to salads, sandwiches, soups, and sauces. You can even make watercress your primary salad green—just trim its thick stems.
Other top-rankers were Chinese cabbage, chard, beet greens, spinach, chicory, leaf lettuce, parsley, romaine lettuce, collards, and turnip greens. The study did not factor in other potentially beneficial plant compounds, however, which are abundant in many of the fruits and vegetables that scored lower, including berries and sweet potatoes.